Hi there !
Welcome to the wonderful world of Sonar. The sources for help and information are pretty much limitless depending on how much you are willing to venture into them.
Hopefully you will find some direct help nearby. This forum is all about sharing and helping out. It will be preferable to put out specific areas where you seek direction so that those that are good at that can chip in.
Meanwhile, do check out the manual / user guide that should have been installed in your Cakewalk programs folder along with your LE installation.
Also, this "Get Started" series of videos in Cakewalk's youtube channel will do just that, get you started.
https://www.youtube.com/watch?v=uqFzau9r9gk&list=PLAD42A98B8ECAFD72 Loads of other youtube videos on Sonar for starters are also available on searching.
There are many Sonar video tutorials available for purchase as well in the Cakewalk store.
All the best and happy music making with Sonar !